ML20247M332
| ML20247M332 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 03/30/1989 |
| From: | Creel G BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-88-010, IEB-88-10, NUDOCS 8904060033 | |
| Download: ML20247M332 (5) | |
Text
I BALTIM O R E GAS AND CHARLES CENTER
- P. O. BOX 1475
- BALTIMORE, MARYLAND 21203 GEORGE C. CREEL Viet PatsIDENT Nucts An E,.tno r (301)260 4455 March 30,1989 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
Document Control Desk
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2; Docket Nos. 50-317 & 50-318 l
NRC Bulletin 88-10: Nonconforming Molded Case Circuit Dreakers l
l
REFERENCE:
(a) Letter from Mr.
B.
Lee (NUMARC) to NUMARC Executives, dated March 9,1989, same subject Gentlemen:
As requested, Baltimore Gas and Electric is providing a report that describes our response to NRC Bulletin 88-10. The bulletin required that licensees take actions to reasonably assure that safety-related molded case circuit breakers can perform their safety functions. These actions consisted of two parts; (1) identify the safety-related breakers in the scope of the bulletin and trace them to their manufacturer, and (2) test any breakers that cannot be traced. We have taken action, as described in the Attachment, and have met the requirements of Bulletin 88-10.
8904060033 890330 PDR ADOCK 05000317 O
, Document Control Desk l
March 30,1989 Page 2 l
Should you have any further questions regarding this ' matter, we will be pleased to discuss them with you.
Very trul y
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STATE OF MARYLAND 68 hlLhk/L$
cer fy that on the d0d day of did' k/
,19M, before me, the I hereb WBAn'L/
subscriber, a Notary Public of the State of Maryland in and for Utf~
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, personally appeared George C. Creel, being dufy' sworn, and' states that he is ce President of the Baltimore Gas and Electric Company, a corporation of the State o Maryland; that he provides the foregoing response for the purposes therein set forth; that the statements made are true and correct to the best of his knowledge, information, and belief; and that he was authorized to provide the response on behalf of said Corporation.
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WITNESS my Hand and Notarial Seal:
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My Commission Expires:
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Attachment cc:
D. A. Brune, Esquire J. E.
Silberg, Esquire
. R. A.Capra, NRC S. A.McNeil, NRC l
W. T. Russell, NRC H. Eichenholz/V. L. Pritchett, NRC T. Magette, DNR A. Marion, NUMARC i
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ATTACHMENT CALVERT CLIFFS' RESPONSE TO NRC BULLETIN 88-10
REFERENCE:
(a) Letter from Mr. B. Lee (NUMARC) to NUMARC Executives, dated March 9,
1989, NRC Bulletin 88-10: Nonconforming Molded Case Circuit Breakers (a)
Confirm that Action Items I through 7 of Bulletin 88-10 have been completed.
Response
1.
We have determined that 27 safety-related molded case circuit breakers were purchased between August I,1983 and August 1,1988. As of December 14, 1988.
there were 10 of these breakers remaining in the warehouse. Fifteen breakers have been installed; one in a safety-related application, fourteen in non-safety-related applications (see Table 1 ).
Two breakers were determined i
defective before installation and one was returned to the manufacturer, the 1
other was thrown away. A quick review of our procurement records shows that we have purchased an additional 48 safety-related molded case circuit breakers since December 1974, 22 of which were purchased since August 1978. A conversation with Paul Gill (NRR) established that a sample size of 27 breakers was adequate for response to the Bulletin.
We verified traceability for these circuit breakers by ensuring that Certificates of Conformance were available. Two of the breakers did not have Certificates of Conformance available. These have been removed from the warehouse stock, and are being retained for one year in accordance with the instructions provided by NUMARC in Reference (a). There are eight breakers remaining in the warehouse.
The following information is provided for the untraceable breakers:
Number of Breakers: 2 Manufacturer: Gould, Inc.,
Industrial Controls Division Model: 600 volt, HE frame, Catalog No. HE3-M040-000501 Procurement Chain: These breakers were purchased directly from Gould.
i However, the Certificates of Conformance are not available; our documentation consists of the shipping papers.
2.
No installed breakers were untraceable.
3.
Per the guidance given in the Reference (a), we have chosen not to test the two untraceable breakers. We have assumed that these breakers are failed for the purposes of complying with the bulletin. The breakers will be retained for one year in accordance with the NUMARC guidance.. _ _ _ _ _ _ _ - _ _ _ -
ATTACIIMENT CALVERT CLIFFS' RESPONSE TO NRC BULLETIN 88-10 4.
All molded case circuit breakers purchased between August 1,
1983 and August 1,1988, were examined as part of the initial sample in Item 1. All of the circuit breakers were traceable with the exception of the two identified in Item 1.
5.
No action is required for this item, 6.
All documentation concerning the response to this bulletin will be transmitted to the plant history files.
7.
We currently purchase all safety-related molded case circuit breakers directly from the manufacturer under a 10 CFR 50, Appendix B program. We have not purchased commercial quality breakers and upgraded them for safety-related use in the past, and have no plans to do so in the future. In fact, most safety-related circuit breakers are used in non-safety-related applications.
(b)
Verify that stored molded case circuit breakers meet the requirements of 10 CFR 50, Appendix B.
Response
The eight remaining safety-related breakers in the warehouse are traceable through Certificates of Conformance to the manufacturer. They were procured safety-related, not commercial quality. These breakers were procured in accordance with 10 CFR 50, Appendix B.
(c)
Identify number, manufacturer and model number of the untraceable circuit breakers.
Resoonse See the discussion under item (a) 1.
No testing will be performed on the untraceable molded case circuit breakers.
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J ATTACHMENT CALVERT CLIFFS' RESPONSE TO NRC BULLETIN 88-10 TABLE (1)
SRI Tan No.
Brgtker Location (as of December 14,1988) 483840 In Warehouse 370659 In Warehouse 483839 In Warehouse 419871 In Warehouse 419872 In Warehouse 413513 In Warehouse 370663 In Warehouse 411515 In Warehouse 483841 MCC 214 SR 370660 MCC 101 NSR 370661 MCC 201 NSR 370662 MCC 206 NSR 486767 MCC 202 NSR 410138 MCC 106 NSR 406616 MCC 201 NSR 406617 MCC 116 NSR 406619 MCC 102 NSR 411514 MCC 116 NSR 489164 MCC 202 NSR 493655 MCC 103 NSR 348201 MCC 201 NSR 348203 MCC 201 NSR 348204 MCC i16 NSR 406618 Discarded 348202 Returned to Manufacturer 390601 Removed from Warehouse 390602 Removed from Warehouse l
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